Swing arm



FIG. 1 is a front view of a swing arm for a swing which is shown inbroken lines to illustrate the environment of the claimed design andforms no part thereof.

FIG. 2 is a top plan view of the swing arm illustrated in FIG. 1; and,

FIG. 3 is a side view of the swing arm illustrated in FIG. 1.

The bottom view and rear view form no part of the claimed design.

CLAIM The ornamental design of a swing arm, as shown and described. 